Strange result of verifying APE Audio File

In Monkey’s Audio, there is a function called Verify, which should verify integrity of APE audio files.

But after I downloaded the latest version of Monkey's Audio (version 7.21), then I don't believe it can do any more.

I got a few files which are different than another set of same files. They come from same source, shoud be identical, but there are a few bytes different. Then I used Monkey's Audio to test all of them, they all past the verification.

There are some other issues too, the Monkey's Audio could not add directory, I tried many time, just nothing added. But I can add files.

References

Possible to check integrity of APE files?
Monkey's Audio
Why use the APE Audio File Format to Back Up Your Audio CD? Monkey’s Audio Explained